HW - Chapter 1 Due: 1. Scientific Theory Part A Which is true about scientific theories? ANSWER: a theory is a model that explains the underlying reasons for observations and scientific laws a theory briefly summarizes past observations and predicts future ones a theory is a scientific opinion with very little observations to support it a theory is a method of learning that emphasizes reason as the way to understand the world none of the other answers apply 2. Exercise
Premium Chemistry
Sains Malaysiana 41(4)(2012): 445-452 Effects of Spin Contamination on the Stability and Spin Density of Wavefunction of Graphene: Comparison between First Principle and Density Functional Methods (Kesan Pemumusan Spin Terhadap Kestabilan dan Ketumpatan Spin bagi Fungsi Gelombang Grafen pelumusan: Perbandingan antara Kaedah Prinsip Pertama dan Kaedah Kefungsian Ketumpatan) LEE SIN ANG*‚ SHUKRI SULAIMAN & MOHAMED ISMAIL MOHAMED-IBRAHIM ABSTRACT The effects of spin contamination on the
Premium Quantum mechanics
the SN2 Reaction between BuBr and I−: An Introductory Organic Chemistry Laboratory Exercise T. Andrew Mobley* Department of Chemistry‚ Grinnell College‚ Grinnell‚ Iowa 50112‚ United States S Supporting Information * ABSTRACT: A simple organic chemistry experiment is described that investigates the kinetics of the reaction between 1-bromobutane (BuBr) and iodide (I−) as followed by observing the disappearance of BuBr and the appearance of 1-iodobutane (BuI) using 1H NMR spectroscopy. In small groups
Premium Chemical reaction Chemistry
1 103 102 101 100 1000 100 10 1 2 9 3 1 2000 +900 +30 +1 Decimal # 2931 Exercise 1.1.2 22 21 20 4 2 1 1 1 0 4 +2 0 Decimal # 6 Binary # 1102 Exercise 1.1.3 21 20 2 1 1 1 2 +1 Binary # 112 Decimal # 3 Exercise 1.1.4 24 23 22 21 20 16 8 4 2 1 1 0 0 1 0 16 0 0 +2 0 Decimal # 18 Binary# 100102 Exercise 1.1.5 27 26 25 24 23 22 21 20 128 64 32 16 8 4 2 1 1 1 1 0 0 0 1 0 128 +64 +32 0 0 0 +2 0
Premium Hexadecimal Binary numeral system Decimal
Unit 1 – Lesson 1 Chemistry Key Questions 1. Element Standard Notation # Of Electrons # Of Protons # Of Neutrons Sodium 23 11 Na 11 11 12 Chromium 24 Ca 26 26 27 ? Phosphorus 32 P 15 15 16 2. Fireworks; Which metals burn to produce these colours? Red – Lithium (Sr) Blue – Cesium (Cs) Pink – Potassium (K) Yellow/Green – Copper (Cu) Orange – Carbon (Ca) 3. Let’s say that the three bottles contain Fe(NO3)3‚ BaCl‚ and AgNO3. These are Iron (III) Nitrate‚ Barium Chloride
Premium Ion Chemistry Ammonia
Purpose: The purpose of this lab is to investigate the reliability of the activity series of metals by testing in solution‚ confirming if the activity series was correct with its predictions. Hypothesis: It is predicted that the metals in solid form will displace metals in solution if located higher over the other within the activity series chart. Materials: 10 test tubes Test tube holder Metals in Solid Form 1. Aluminum 2. Iron 3. Zinc 4. Magnesium 5. Zinc 6. Aluminum 7. Copper
Premium Metal Aluminium Copper
Weak acid-weak base titration Only the first two mentioned above will be investigated in this experiment. Aims/Objectives 1. To understand to importance of selecting suitable indicators for detecting the end-points of acid-base titrations. 2. To obtain titration curves for: a. Strong acid-weak base titration b. Weak acid-strong base titration Learning Outcome 1. Able to choose a suitable indicator for detecting the end points of different types of acid-base titrations. 2. Able to draw
Free Titration PH indicator
Date report submitted: June 18‚ 2015 Title: Lab Techniques and Measurements PURPOSE: The purpose of this experiment is for the students to get a better knowledge with the laboratory tools and techniques. This experiment taught me how to convert between SI units and standard American units of mass‚ length‚ temperature‚ volume and time as well as how to measure the units. Students become proficient in laboratory techniques such as measuring temperature and volume and calculating within them. Procedure:
Premium Volume Density Measurement
Exercise 1: Dissolved oxygen is oxygen that is trapped in a fluid‚ such as water. Since virtually every living organism requires oxygen to survive‚ it is a necessary component of water systems such as streams‚ lakes and rivers in order to support aquatic life. The dissolved oxygen is measure in units of ppm—or parts per million. Examine the data in Table 2 showing the amount of dissolved oxygen present and the number of fish observed in the body of water the sample was taken from; finally‚ answer
Premium Water
Figure 1: The reaction rates of enzyme-catalysed reactions of hydrogen peroxide into diluted water depending of the varying percentage concentrations of catalase. Mean rates (±SE) of 5 separate experiments (n=5) are shown. Line of best fit (y = 0.0002x + 0.0038 R² = 0.9154) is presented using the trend line function in Excel. Figure 2: Absorbance readings of different concentrations of BSA. Individual data is presented of one group is presented (n=1). Line of best fit (y
Premium Enzyme Chemical reaction Catalase